A phase stable short pulse generator using a DPMZM and phase modulators for application in 160 GBaud DQPSK systems |
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| Authors: | Yu Ji Yan Li J. Wu F.Z. Zhang K. Xu W. Li X.B. Hong J.T. Lin |
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| Affiliation: | 1. Computer Center of Shanxi University, Taiyuan, Shanxi 030006, PR China;2. College of Physics and Electronics Engineering of Shanxi University, Taiyuan, Shanxi 030006, PR China |
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| Abstract: | A method of 40 GHz phase stable short pulses generation is experimentally demonstrated. It is based on a dual parallel Mach–Zehnder modulator (DPMZM) driven by only one electrical sinusoidal clock and two cascaded phase modulators. The generated pulses are characterized with full-width-at-half-maximum pulse width of 1.9 ps, extinction ratio of 27 dB, timing jitter of 36 fs and signal to noise ratio over 30 dB. The high quality and phase stability of the pulses are further experimentally verified in a 4 × 40 GBaud differential quadrature phase shift keying (DQPSK) optical-time-division-multiplexing (OTDM) system. |
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